- Could be dirt, debris, corrosion in charging port. Could be faulty dock port. iPhone 5 still have full Warranty with Apple, so be careful what you do with it.
- Try this, press Home Button twice quickly. In the New Row of icons at the bottom of screen, press and hold on an icon until you get the Red Minus signs. Tap the Red Minus signs, especially the one for Settings App.
- GSM iPhone 4 has SIM Tray Slot and Antenna Band (black line) on top of iPhone. CDMA iPhone 4 does not have SIM Tray Slot. iPhone 4S has SIM Tray Slot and no Antenna Band (black line) on top of iPhone.
- LCD Display is damaged. You need to replace LCD Display for iPhone 3GS. Before opening and during any repair of iPhone 3GS make sure the iPhone is OFF.
- If the small connector clamp for the Home Button Flex is now missing? Then the replacement part is Charging Port Assembly with Flex Cable, it also has lower mic and the important home button connector all as one part.
- Check your work, most likely the LCD Display connector came loose from the Logic Board.
- That small clip loosely snaps onto the Wi-Fi Antenna Plate, the long top screw (second longest in the phone) goes through this piece to get optimum Wi-Fi reception. It has nothing to do with screen function or iPhone function other than Wi-Fi. For the screen problem, try Reset, holding both home and power buttons for about 10 seconds until the iPhone begins to start. Try to carefully reseat the LCD Display connector to the Logic Board.
- I would enter this number in contacts, as a real contact. Once the iPhone accepts it. Then I would delete this real contact, taking the problem one with it.
- You have to place your iPhone in Recovery Mode and Restore the iPhone with iTunes on computer. To be able to do this, it is simple with a Power Button, since yours is faulty, this is a problem. You could wait for iPhone to power down, then place in Recovery Mode. I would try a utility such as TinyUmbrella to place iPhone in Recovery Mode, then Restore with iTunes.
- Put this SIM in another old ATT phone. Use the phone to make some calls. Call ATT and tell them about this old phone and that you do not want the user to have access to internet, and request that the Data be Blocked. Call back later to verify that the Data is truly blocked, if not complain, that the user of this SIM does not have permission to use internet and you want the Data Blocked by ATT. When this is finally done, then put the SIM into iPhone and there you go, no Data and therefore no Data Charges. For internet use WiFi.
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